December 2025 performance-focused delivery: Implemented database indexing optimization, enhanced API error context, and modernized email handling across messaging and email-reader services. These changes deliver faster data retrieval, clearer client feedback, and improved credential management, underpinning upcoming automation and reliability improvements in production.

Month: 2025-11 — Key features delivered: Enhancement to statistics retrieval to support all message types when MessageType is omitted (empty MessageTypes list) and updated tests to validate this behavior. Major bugs fixed: Bug in statistics retrieval when no MessageType was provided, now correctly returns statistics across all message types. Overall impact and accomplishments: Improves analytics reliability and dashboard accuracy by ensuring complete statistics without requiring a MessageType filter; reduces edge-case errors in search queries and reporting flows. Technologies/skills demonstrated: Backend API stability improvements, test-driven development (updated tests for edge cases), version control discipline, targeted bug fixing in the Sundsvallskommun/api-service-messaging repository.

October 2025 monthly summary for Sundsvallskommun/api-service-invoice-sender focused on strengthening invoice reporting accuracy and robustness. Delivered a feature to ensure status reports exclude ArchiveIndex.xml from totals, prevent negative invoice counts, and introduced a dedicated method to compute total items excluding the archive index, with updated templates and unit tests and README testing instructions. Addressed critical issues in the status-report counter and edge cases to improve reliability of financial metrics. Enhanced testing, documentation, and maintainability to support data-driven decisions and audit readiness.

September 2025 monthly summary for Sundsvallskommun/api-service-messaging. Focused on delivering a forward-looking Digital Mail API upgrade with compatibility enhancements, test infrastructure uplift, and a clear deprecation strategy to minimize customer disruption. Delivered the foundational resources and middleware to enable a modern digital mail workflow with organization-number support, while laying out a migration path via OpenAPI updates.

In July 2025, delivered a targeted improvement to the EWS email reading service by externalizing configuration and removing System.getProperty dependency, enhancing robustness, testability, and maintainability.

June 2025 monthly summary for Sundsvallskommun/api-service-messaging: Key features delivered: - SnailMailSender integration upgraded to API v3.1 with header cleanup: removed deprecated x-issuer header and ensured correct propagation of issuer/X-Issuer headers, improving compatibility and security in the snail mail workflow. - WebMessage attachments validation: enforced that web messages with attachments must include at least one attachment; updated OpenAPI spec, WebMessageRequest model, and tests to reflect this rule. Major bugs fixed: - ApiMapper attachment processing: broadened exception handling during attachment content removal to catch all exceptions and prevent crashes; enhanced logging for easier debugging. Overall impact and accomplishments: - Increased reliability and resilience of the messaging API with targeted changes that reduce invalid messages and runtime crashes. - Clearer API contract and tests for attachment handling, leading to lower support incidents and smoother integration with downstream services. - Maintained clean, auditable changes with concise commits tied to each capability. Technologies/skills demonstrated: - API versioning and header management, HTTP integration quality, and defensive exception handling. - OpenAPI specification alignment and test-driven validation. - Improved logging practices for better observability and faster incident resolution.

May 2025 highlights across Sundsvallskommun repositories focused on API reliability, data integrity, and developer productivity. In api-service-messaging, we standardized resource naming (renaming 'message' to 'messages') and unified error responses to application/problem+json, enhanced attachment handling with comprehensive integration tests, and introduced the X-Sent-By header (with a sender extraction utility) to improve auditability for both messaging and snailmail flows. In api-service-invoice-sender, XML processing was modernized from Jsoup to standard Java XML parsing and XPath with improved thread-safety and tests, reducing maintenance and race conditions. A Docker Compose-based local integration environment (WireMock and Samba) was added to streamline end-to-end testing, and snail mail address propagation DTO edge cases were fixed for correctness in asynchronous flows. These changes collectively reduce risk, improve debuggability, and enable safer, faster deployments across services.

April 2025 achievements for Sundsvallskommun/api-service-messaging focused on history data access, API health, and maintainability. Delivered two History API enhancements: (1) metadata endpoint for message metadata without file content, with OpenAPI spec and API mapper updates; deprecated the legacy /{municipalityId}/message/{messageId} endpoint; added tests for metadata history mapping and file-content handling; (2) endpoint to retrieve a specific historical message by user, including details and recipients; added integration tests and OpenAPI updates. Also expanded test coverage and established a deprecation path to ensure backward compatibility. Outcomes include improved bandwidth efficiency, faster metadata retrieval, clearer API contracts, and stronger developer onboarding through updated specs.

January 2025 performance highlights for Sundsvallskommun/api-service-messaging. Focused on reliability of external snail-mail integration and improved internal data mapping tests. Delivered two key items that strengthen service reliability, test coverage, and maintainability, with traceable commits for auditability.

December 2024 — Sundsvallskommun/api-service-messaging: Delivered reliability and resilience enhancements for the Digital Mail integration, focusing on error handling semantics and circuit-breaker stability to improve delivery continuity and reduce outages. Key changes: - Treat 404 NOT_FOUND responses as non-errors during Digital Mail calls and update the error decoder accordingly, reducing unnecessary failure signaling. - Harden DigitalMailSender resilience by preventing circuit-breaker trips caused by specific ClientProblem exceptions, avoiding cascading outages. - Implemented changes with traceable commits to enable quick rollback if needed. Impact: - Improved digital mail delivery continuity and overall uptime of the messaging service. - Decreased false-positive failure alerts and operator overhead due to unnecessary circuit-breaker openings. - Clearer error classification leading to faster triage and remediation. Technical focus and business value: - Reliability engineering, fault-tolerance, and integration stability for critical messaging workflows, directly supporting customer communications and service-level targets.

Monthly summary for 2024-10: Delivered granular cron scheduling for the invoice-sender service, enabling separate cron expressions for invoices and reminders with distinct batch-type scheduling. Implemented configuration and integration-property enhancements and updated the invoice processor to support granular automated generation. Contributions focused on improving automation reliability and scalability of invoicing workflows. No major bugs fixed this month.